/Engine/Plugins/Experimental/CharacterFXEditor/BaseCharacterFXEditor/Source/BaseCharacterFXEditor/Public/BaseCharacterFXEditorToolkit.h
Called when a toolkit requests an overlay widget to be added to the viewport. Not relevant in the absence of a viewport.
virtual void AddViewportOverlayWidget ( [TSharedRef](API\Runtime\Core\Templates\TSharedRef)< [SWidget](API\Runtime\SlateCore\Widgets\SWidget) > InViewportOverlayWidget )